Brightness control for Raspberry Pi.
You'll need the following dependencies:
$ sudo apt install meson ninja-build valac libvala-0.42-dev libgtk-3-dev
Run meson build to configure the build environment:
meson --prefix=/usr/local -Dbuildtype=release build
This command creates a build directory. For all following commands, change to
the build directory before running them.
To build pib, use ninja:
ninja -j4
To install, use ninja install
sudo ninja install
Note compositing has to be enabled
